check network connectivity in onPageTranslated callback.

components/translate/content/browser/content_translate_driver.cc

Index: components/translate/content/browser/content_translate_driver.cc
diff --git a/components/translate/content/browser/content_translate_driver.cc b/components/translate/content/browser/content_translate_driver.cc
index 41ae73f6e36a761f96664733875f4446565f51d7..b5b93fea5ad69c65f146c7dfef67b1dd8cc45dca 100644
--- a/components/translate/content/browser/content_translate_driver.cc
+++ b/components/translate/content/browser/content_translate_driver.cc
@@ -20,6 +20,7 @@
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/referrer.h"
+#include "net/base/network_change_notifier.h"
 #include "net/http/http_status_code.h"
 #include "url/gurl.h"
 
@@ -259,6 +260,10 @@ void ContentTranslateDriver::OnPageTranslated(
   if (cancelled)
     return;
 
+  if (net::NetworkChangeNotifier::IsOffline()) {
+    error_type = TranslateErrors::NETWORK;
+  }
+
   translate_manager_->PageTranslated(
       original_lang, translated_lang, error_type);
   for (auto& observer : observer_list_)